title: Comparison of solvent extraction and solid-phase extraction for the determination of polychlorinated biphenyls in transformer oil.
abstract: Solid-phase extraction (SPE) of nine polychlorinated biphenyls (PCBs) from transformer oil samples was evaluated using octadecyl (CI8)-bonded porous silica. The efficiency of SPE of these PCBs was compared with those obtained by solvent extraction with DMSO and hexane. Average recoveries exceeding 95% for these PCBs were obtained via the SPE method using small cartridges containing 100mg of 40 pm CI8-bonded porous silica. The average recovery by solvent extraction with DMSO and hexane exceeded 83%. It was concluded that the recoveries and precision for the solvent extraction of PCBs were poorer than those for the SPE.
authors.affiliation: New Custom House Laboratory, Ballard Estate, Mumbai 400 001, Maharashtra, India. Electronic address: aaanil01@gmail.com.
authors.forename: A N
authors.initials: AN
authors.lastname: Mahindrakar
authors.forename: S
authors.initials: S
authors.lastname: Chandra
authors.forename: L P
authors.initials: LP
authors.lastname: Shinde
mesh_terms: D005591:Chemical Fractionation / Q000379:methods*; D059029:Electronic Waste; D004581:Electronics; D009821:Oils / Q000737:chemistry; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D012822:Silicon Dioxide; D052616:Solid Phase Extraction / Q000379:methods; D012997:Solvents
chemical_list: D009821:Oils; D012997:Solvents; D012822:Silicon Dioxide; D011078:Polychlorinated Biphenyls
keywords: GC–MS; PCBs; SPE; Solvent extraction; Transformer oil